Japanese translation updates.
Japanese translation updates.

* subversion/po/ja.po: Improve a translation for "operate on".
  Now ja.po has 1571 translated messages against r24141 (Emacs PO-mode
  status: "1572t+322o").

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion